Malicious PDF — malware analysis report

Static analysis result for SHA-256 255e6287cc33a603…

MALICIOUS

PDF

49.0 KB Created: 2020-08-29 02:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bca3d1f62faaaf90e66f984c3dbe0e5 SHA-1: 3766f538660f615710faa702b1e008f48f09ae44 SHA-256: 255e6287cc33a603c69b0dc6d83305aa07f1d1ff1f01f70a42ebda9a6ad46260
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=powder+coating+oven+build+plans'. This URL is likely part of a phishing or scam campaign designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to the lure, and the file itself is flagged by an ML classifier as malicious. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/wix?keyword=powder+coating+oven+build+plans
    • https://cdn.shopify.com/s/files/1/0436/9930/6648/files/43987244365.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4080/files/75636528250.pdf
    • https://cdn.shopify.com/s/files/1/0438/5298/8566/files/interview_questions_template_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/zedemenabelefumesoledasuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8253/7365/files/56530140229.pdf
    • https://static.usrfiles.com/ugd/b8c837_196c6694c5074fdab78e83b1d9110e4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_945b6f7220ff415db9fb288c663fedef.pdf
    • https://static.usrfiles.com/ugd/b8c837_c44405b3f47f411096c8036deed1dd57.pdf
    • https://static.usrfiles.com/ugd/b8c837_b56ac838de1e45c4aa4b3ce74cbf2cae.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c3f0db402aa4661add6d593c1d3be1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd83b711650c46d0ace2eb252c52e830.pdf
    • https://cdn.shopify.com/s/files/1/0440/4409/1557/files/191850010.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/pibik.pdf
    • https://cdn.shopify.com/s/files/1/0438/2448/0416/files/28725429642.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073df.bin
20a8d9a550e9a4b0fb667fd1a04f1d269f84c55714821ac4b0e47f296431e944		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DF 5416 bytes
font_01_sfnt_off00008663.bin
56e113b373aeb77a49a29e1eefae6c31b711a3d2e3009ca9326fac49096c164c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8663 10128 bytes
font_02_sfnt_off0000a910.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA910 4324 bytes

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